<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <style>
        .wai {
            border: 2px solid rgb(167, 79, 79);
            width: 200px;
            height: 200px;
        }

        .nei {
            border: 2px solid black;
            width: 100px;
            height: 100px;
            /* margin: 50px;*/
           /* margin: 30px 50px ;*/
        }
    </style>
</head>
<body>
<div class="wai">
    <div class="nei">

    </div>
</div>
</body>
</html>